Tractor



FIG. 1 is a front view of a tractor showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a reduced left side view thereof;

FIG. 4 is a reduced right side view thereof;

FIG. 5 is a reduced top plan view thereof;

FIG. 6 is a reduced right front perspective view thereof;

FIG. 7 is a reduced left rear perspective view thereof;

FIG. 8 is an enlarged front view thereof showing a portion of the tractor;

FIG. 9 is an enlarged right side view thereof showing a portion of the tractor;

FIG. 10 is an enlarged front left perspective view thereof showing a portion of the tractor; and,

FIG. 11 is an enlarged front right perspective view thereof showing a portion of the tractor. 

The ornamental design for a tractor, as shown and described. 